<template>
    <div class="list" ref="wrapper">
      <div>
        <div class="area">
          <div class="title border-topbottom">当前城市</div>
          <div class="button-list">
            <div class="button-wrapper">
              <div class="button">{{this.currentCity}}</div>
            </div>
          </div>
        </div>
        <div class="area">
          <div class="title border-topbottom">热门城市</div>
          <div class="button-list">
            <div
              class="button-wrapper"
              v-for="item of hot"
              :key="item.id"
              @click="handleCityClick(item.name)"
            >
              <div class="button">{{item.name}}</div>
            </div>
          </div>
        </div>
        <div
          class="area"
          v-for="(item,key) of cities"
          :key="key"
          :ref="key">
          <div class="title border-topbottom">{{key}}</div>
          <div class="item-list">
            <div class="item border-bottom"
                 v-for="citys of item"
                 :key="citys.id"
                 @click="handleCityClick(citys.name)"
            >
              {{citys.name}}</div>
          </div>
        </div>


      </div>
    </div>
</template>

<script>
  import Bscroll from 'better-scroll'
  import {mapState,mapMutations} from 'vuex'
    export default {
        name: "CityList",
      props:{
         hot:Array,
        cities:Object,
        letter:String
      },
      computed:{
        ...mapState({
          currentCity:'city'
        })
      },
      methods:{
        handleCityClick(city){
         // this.$store.dispatch('changeCity',city)

          // this.$store.commit('changeCity',city)
          this.changeCity(city)
          this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
      },
      watch:{
        letter(){
          if(this.letter){
            const  element=this.$refs[this.letter][0]
            this.scroll.scrollToElement(element)
          }
        }
      },
      mounted(){
        this.scroll=new Bscroll(this.$refs.wrapper)
      },

    }
</script>

<style lang="stylus" scoped>
  .border-topbottom
    &:before
      border-color #ccc
    &:after
      border-color #ccc
  .border-bottom
    &:before
      border-color #ccc
  .list{
    overflow hidden
    position absolute
    top 1.7rem
    left 0
    right 0
    bottom 0
  }
  .title{
    line-height .54rem
    background #eee
    padding-left .2rem
    color #666
    font-size .26rem
  }
  .button-list{
    overflow hidden
    padding .1rem .6rem .1rem .1rem
  }
  .button-wrapper{
    float left
    width 33.33%
  }
  .button{
    margin .1rem
    padding .1rem 0
    text-align center
    border .02rem solid #ccc
    border-radius .06rem
  }
  .item-list{

  }
  .item{
    line-height .76rem
    padding-left .2rem
  }

</style>
